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The Web Weekly newsletter keeps you up to date, teaches you web development tricks and covers all things working in tech.

Guten Tag! Guten Tag! πŸ‘‹

How could you use the new CSS @scope to create encapsulated component styles? What does the quotes CSS property do? And when would you use the never TypeScript type?

Turn on the Web Weekly tune and find all the answers below. Enjoy!

Christian listens to "DOMi & JD BECK, Anderson .Paak - TAKE A CHANCE" and says:

This song is a combination of some of my favorite music nerds, it just makes me happy.

Do you want to share your favorite song with the Web Weekly community? Hit reply; there's only one more song left in the queue.

Happy CSS Naked Day! Happy what?

Let me share the idea of this web holiday.

The idea behind CSS Naked Day is to promote web standards. Plain and simple. This includes proper use of HTML, semantic markup, a good hierarchy structure, and of course, a good old play on words. In the words of 2006, it’s time to show off your "body" for what it really is.

I love this idea. Unfortunately, I missed to participate. But hey, I'm all for promoting web standards. How does my site look without CSS, then?

My website without CSS. It's mainly looking okay but icons aren't sized properly.

Ouch! Some SVGs are missing width and height attributes. Otherwise, the site looks okay. Semantic HTML for the win!

If you don't know how to turn off the styles, for my site, I opened devtools, found the one and only style element, and hit delete.

How would you do it for sites with multiple stylesheets, though? Maybe you also want to toggle specific sheets on and off to debug CSS class collisions. Some browsers have UI for this task, and the DevTools Tips list them all.

What does your naked site look like?

Open tabs

Browsers should offer more site settings

What if you had real control over Light Mode / Dark Mode on a per-site basis?

Bramus is onto something close to my heart. For years, I've secretly advocated for additional and more accessible site settings. What do I mean by that?

I believe that browsers should provide interfaces to control each site's experience. As a developer, I have so many CSS media queries to react to user preferences (prefers-reduced-motion, prefers-contrast, ...), but normal people don't know about them, and the settings aren't easy to control. And most annoyingly, I can't control these settings per-site.

For example, I rarely get motion sickness, but some sites overdo it with parallaxing. Wouldn't be great if I could open a settings dialog and turn off movements for this one site? 100%.

And isn't it wild that we all implement custom dark mode toggles to remember a visitor's preference? It's a nice coding exercise, but isn't this all wasted effort?

Browsers should solve these problems for us, and Bramus is pushing this idea forward with a working prototype. πŸ‘

Control all the sites


A progress slider with with a few buttons below

This React tutorial explains how to animate a progress element and becomes an excellent read after introducing the useTransition React hook. (TIL!)

If you're writing React, this post is worth it!

Transition states

Be ready for popover

Article header with Adam's avatar is on the left. The title is "Steal this popover code"

Two more days, and it's another big day for the web. On April 16, Firefox 125 will ship, and with it, the new popover features will enter mainstream. The popover and popovertarget attributes are ready to rumble soon!

If you're looking for some base styles to get the most out of your new popovers, Adam was so kind to do the hard work for us.

Steal the code

The code uses @starting-style, which doesn't work in Firefox yet but can be treated as progressive enhancement.

TIL β€” Google supports specialized sitemaps

An example news sitemap with tons of XML.

Let's assume the internet won't collapse under all this AI-generated content, and search engines will still play a role in the future. πŸ˜…

This week I learned that you can point Google to specialized sitemaps for images, videos and news.

Index all your content

You're halfway through!

Wowza! Would you enjoy getting Web Weekly straight to your inbox?

The wonderful weird web – Throw the bag!

A screenshot of the game "Dog Poo Golf" showing a dog and its owner holder a bag of poo.

Please disperse. There's nothing to see here. It's only a game in which you have to throw a bag of poo into the trash bin.

What a sentence to write...

Clean up after your dog

What are your favorite internet corners? Send them my way, and I'll include them in Web Weekly!

Trusted types are being worked on

// returns a policy, but you  // don't really need to do anything  // with the default one trustedTypes.createPolicy(     "default",      {       createHTML: s => {            return DOMPurify.sanitize(s)        }      } );

You might have heard of Igalia. Igalia is a company working on browser engines. According to Brian Kardell, they started working on bringing the Trusted Types API to Firefox and Safari.

Why's this cool? Trusted Types will limit dangerous API access (think of users injecting evil JavaScript via innerHTML) by a reasonable amount. If you want to learn how they work, Brian has you covered.

Bless your strings

Scope your component styles

<article>   <style>     @scope {       :scope p {         all: unset;         color: red;       }     }   </style>   <p>This text is now red and small!</p> </article>

Have you looked into CSS @scope yet?

It's okay. Full browser support isn't there yet with Chromium 118+, Safari 17.4, and no Firefox support.

But I'm excited about it. Not only does CSS scoping include roots and limits (@scope (.article-body) to (figure)), it also has built-in HTML style encapsulation. I can't wait to include scoped inline styles in my blog's demo components.

If you want to learn more about using CSS scoping, Robin's newsletter covers how to break the cascade for components!

Kill the cascade

Never miss an uncovered code branch in TS

function assertNever(x: never): never {   throw new Error("Unexpected object: " + x); }

When should you use the never type in TypeScript? If you know when, are you sure you're using never correctly? Stefan Baumgartner explains why many people use never incorrectly.

Don't miss code branches

CSS quotes, open-quote and close-quote

blockquote::before {   content: open-quote; }  blockquote::after {   content: close-quote; }

Do you know that different languages use different quotation characters? In Germany, we use these friends: β€ž β€œ. Our neighbors, the French, use these: Β« Β». How could you display the correct quotes?

Easy peasy β€”Β just let CSS do its job.

Quote the good things

Random MDN – input pseudo-classes

Preview of the table listing pseudo classes on MDN.

From the unlimited MDN knowledge archive...

Real talk: How many pseudo-classes could we add to an input element? As always, MDN has all the answers.

Style all the inputs

TIL recap – ol attributes

An ordered list starting at "3" controlled via the HTML "start" attribute.

Let's say you have an ordered list going from 1 to 5. Then there's a paragraph. And then, you want to continue your list starting at 6. How do you do that?

The answer: use good old HTML.

Control your lists

Find more short web development learnings in my "Today I learned" section.

New on the platform

/* Named color values */ color: light-dark(black, white);  /* RGB color values */ color: light-dark(rgb(0 0 0), rgb(255 255 255));  /* Custom properties */ color: light-dark(var(--light), var(--dark));

Are you tired of typing lengthy dark mode media queries? If so, there's a new CSS function in town β€” light-dark.

Write less code

Three valuable projects to have a look at

A new Tiny Helper

Modern Font Stacks β€” System font stack CSS organized by typeface classification for every modern OS  The fastest fonts available. No downloading, no layout shifts, no flashes β€” just instant renders.

If you care about performance (and why wouldn't you?), you know web fonts are classic layout shift offenders. To avoid jumpy text, you should opt for local fonts whenever possible.

Modern Font Stack lists them all and lets you preview how these fonts will look in a demo article.

Use system fonts

Find more single-purpose online tools on

Thought of the week

If you don't have a website because you're unsure what to put there, here are some wise words from Ana Rodrigues.

You don't have to be a content creator to have a website.

Go and claim your internet corner; it's worth it!

This is all, friends!

Loved this email? Hated this email? I want to hear about it!

If you think there’s something that needs to be improved or something that you enjoyed, reply to this email because I want to know more!

And with that, take care of yourself - mentally, physically, and emotionally.

I'll see you next week! πŸ‘‹

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Stefan standing in the park in front of a green background

About Stefan Judis

Frontend nerd with over ten years of experience, freelance dev, "Today I Learned" blogger, conference speaker, and Open Source maintainer.

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